Efficient Detection of Zero-Padded OFDM Signals with Large Blocks

T. Araújo and R. Dinis (Portugal)


OFDM, Block Transmission, Zero-Padded.


In this paper, we present a frequency-domain receiver for ZP-OFDM schemes (Zero-Padded Orthogonal Frequency Division Multiplexing) where the duration of the channel impulse response is a significant fraction of the duration of the OFDM block. The proposed receiver has a rela tively low complexity, allowing an FFT-based (Fast Fourier Transform) implementation. The proposed receiver is suit able to ZP-OFDM systems with very large blocks (hun dreds or even thousands of subcarriers), since it does not re quires the inversion or the multiplication of large matrixes.1

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